Form-roll trip mechanism



Jan. 1, `1924 J. R. BLAINE FORM ROLL TRIP MECHANISM Filed March 2s. 1921s sheets-sheet 1 rllllllxl llllllUllllllllll J. R. BLAINE FORM ROLL TRIPMEGHANISM Jan. l, 1924 3 Sheets-Sheet 2 Filed March 28 1921 J. R. BLAINEFORM ROLL TRIP MECHANISM Filed March 28 1921 3 Sheets-Sheet 3 Qn QPatented Jan. 1,1924.

ymuren v,STAT Es- PATENT oFFic.

JOSEPH R. BLAINE, or CHICAGO, ILLINOIS, AssIGNon To MIEHLE PRINTINGPanes a MANUFACTURING Co., or CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS;

` FORM-ROLL' TRIP MECHANISM.

Applicationy filed March 28, 1921. y Serial No. 456,260.

To all who-m z't may concern:

Be it known that 1, JOSEPH R. BLAINE, a citizen of the United States,residing at Chicago, in the county of Cook and State of illinois,` haveinvented certain new and useful Mechanism, of which t-he following is aspecification. -V

This invention relates to form roll trip H., mechanism, and is animprovement of the f elevation of said trip mechanism; and,

Figure 3 isa fragmentary side elevation showing the various rollsassociated with the form cylinder in their cooper-atitve positions.

In view of the fact that many parts of this form roll trip mechanism aredisclosed. in my said copending application, only suchl parts which formthe present invention will be specifically described, some of the otherparts being referred to only in a general way.

As is well understood in the art, inkmg rolls are tripped to preventtoomuch ink being supplied to the plate cylinder when no sheets are fedthrough the press, or, in other words, the inking rolls are tripped`under certain conditions to maintain a uniform supply of inkon 'theplate cylinder. Furthermore, it is necessary, rin order to prevent badmarking or uneven inking, to have the rolls tripped on and -off at thegap in the cylinder, and in this particular case the rolls are trippedon and off sequentially because the rolls cover a space larger than thegap. With the present mechanism, as also with the mechanism in mycopending application,

the inking rolls are tripped on and off, fully automatically, and alsooptionally by hand.

Referring to the figures of the drawings, it will be noted that haveshowna form Improvements' in Form-Roll Trip' cylinder 10, cooperatingwith which are two sets 11 of inkingrolls, each including three inkingrolls 12 rrwhich under normal printing conditions engage the platecylinder for distributing ink thereon. FourpivotallyV mounted framemembers 13v are'provided, two at each end ofthe rollers, and accordingly only two are shown in the figures of the drawings. pivotallymounted, as at 14, and Vhas projecting portions 15, 16 and 17 engagedbyVv portions of the inking vrolls 12, the last two projections in eachcase being more pronounced.Y The inking rolls normally reist upon theplate cylinder 10, but just'clear the projections of the plate members13, and accordingly, if theplate members 13 are caused to rise and fallYabout their pivotal. points 14, the inking rolls likewise will rise outof engagement or fall into engagement with respect to the plate cylinder10.

To control the rise and fall of the rolls, Il have provided the framemembers 13 with cam slots 18, which are traversed by projections 19ineach case carried'at the end of one arm 20 of a bell crank leverpivoted'jat 21, the other arm of the bell crank lever be-y ing in theform of a toothed segment 22, which meshes with the teeth 23 of acomposite rack trip bar 24, the teeth on the opposite side of the bar 24being in mesh with a segment 25 forming part of a bell crank lever 26ypivotally mounted at 27 and having another arm 28. From the`arrangement thus far vdescibed, it is apparent that if the rack tripbars 24 are forced downwardly, the segments 22 will be rocked downwardlyand the projections 19 of arms 20 will be forced downwardly in the camslots, which are eccentrically arranaged with Each of the frame membersisV respect to the Vpivotal centers 21 of the bell crank levers, causingthe frame members 13 to swing upwardly about their pivotal centers 14for raising the inking rolls and disengaging the latter fromthe formcylinder 10. Likewise, when the trip bars 24 are permitted to springback into normal position as a resultof energy stored in return springs29, the arm Vprojections 19 will move Yupwardly in the eccentric camslots 18 to permit the inking rolls 12 to move back into engagement withthe form cylinder 10.v As stated hereinabove, in view of the fact thatthe inking rolls 12 cover a space wider than the gap, thesevrolls 'ijnsets are raised and lowered in a given sequence, the action beingentirely automatic, as disclosed in my said copeuding application.

For` manually raising and lowering the inking rolls l2, a lever 26 ispivotally oonnected by a link 30 to one arm 8l of a control lever'pivoted at 33. The lever 2G on the oppositely arranged lever 28 ispivotally connected by a link 34 to vanother arm 35 of said lever 32having a handle portion 36.

In the figures of the drawings the inlring rolls l2 are in engagementwith the forni cylinder 10, and, as shown in dotted lines in Figure 2,the inking rolls are tripped out of engagement With said form cylinder.This tripping action may be automatic, yor manual, as hereinabovedescribed. By means of this simple and improved form roll tripmechanism, including the frame members "ha-ving eccentricallv formed camslots, the

efciency and operation of the trip mechamsm is made more commercial.

It is my intention to cover all modifications of the invention 4fallingWithin the spirit and scope oi' the following claim.

I claim:

In combination, a form' cylinder, ajpair of sets of inkingrollerscooperating there-V with, a pair ofsets of frame members, each ofsaid sets of frame members including two frame members mounted at theends of said rollers, each of said frame members having projectiongmembers engaging portions of said rollers, said frame members having camf slots, arms for operating said frame members, said arms being providedwith projeetions adapted to .ride iny said cam slots,

and rack trip bars for operating said arms,

said bars having means for manually operating same.

Signed at Chicago, Illinois, this 25thk day of March, 1921. a

JOSEPH a. Brains.

